<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <!-- 不含特殊楼层的最大连续楼层数 -->
    <script>
      var maxConsecutive = function (bottom, top, special) {
        special.sort((a, b) => a - b)
        let ans = 0
        for (let i = 0; i < special.length; i++) {
          ans = Math.max(ans, special[i] - bottom)
          bottom = special[i] + 1
        }
        if (special[special.length - 1] !== top) {
          ans = Math.max(ans, top - bottom + 1)
        }
        return ans
      }
      console.log(maxConsecutive(2, 9, [4, 6]))
    </script>
  </body>
</html>
